import glob import os.path import sys from collections import namedtuple import torch from omegaconf import OmegaConf from ldm.util import instantiate_from_config from modules import shared CheckpointInfo = namedtuple("CheckpointInfo", ['filename', 'title', 'hash']) checkpoints_list = {} try: # this silences the annoying "Some weights of the model checkpoint were not used when initializing..." message at start. from transformers import logging logging.set_verbosity_error() except Exception: pass def list_models(): checkpoints_list.clear() model_dir = os.path.abspath(shared.cmd_opts.ckpt_dir) def modeltitle(path, h): abspath = os.path.abspath(path) if abspath.startswith(model_dir): name = abspath.replace(model_dir, '') else: name = os.path.basename(path) if name.startswith("\\") or name.startswith("/"): name = name[1:] return f'{name} [{h}]' cmd_ckpt = shared.cmd_opts.ckpt if os.path.exists(cmd_ckpt): h = model_hash(cmd_ckpt) title = modeltitle(cmd_ckpt, h) checkpoints_list[title] = CheckpointInfo(cmd_ckpt, title, h) elif cmd_ckpt is not None and cmd_ckpt != shared.default_sd_model_file: print(f"Checkpoint in --ckpt argument not found: {cmd_ckpt}", file=sys.stderr) if os.path.exists(model_dir): for filename in glob.glob(model_dir + '/**/*.ckpt', recursive=True): h = model_hash(filename) title = modeltitle(filename, h) checkpoints_list[title] = CheckpointInfo(filename, title, h) def model_hash(filename): try: with open(filename, "rb") as file: import hashlib m = hashlib.sha256() file.seek(0x100000) m.update(file.read(0x10000)) return m.hexdigest()[0:8] except FileNotFoundError: return 'NOFILE' def select_checkpoint(): model_checkpoint = shared.opts.sd_model_checkpoint checkpoint_info = checkpoints_list.get(model_checkpoint, None) if checkpoint_info is not None: return checkpoint_info if len(checkpoints_list) == 0: print(f"Checkpoint {model_checkpoint} not found and no other checkpoints found", file=sys.stderr) return None checkpoint_info = next(iter(checkpoints_list.values())) if model_checkpoint is not None: print(f"Checkpoint {model_checkpoint} not found; loading fallback {checkpoint_info.title}", file=sys.stderr) return checkpoint_info def load_model_weights(model, checkpoint_file, sd_model_hash): print(f"Loading weights [{sd_model_hash}] from {checkpoint_file}") pl_sd = torch.load(checkpoint_file, map_location="cpu") if "global_step" in pl_sd: print(f"Global Step: {pl_sd['global_step']}") sd = pl_sd["state_dict"] model.load_state_dict(sd, strict=False) if shared.cmd_opts.opt_channelslast: model.to(memory_format=torch.channels_last) if not shared.cmd_opts.no_half: model.half() model.sd_model_hash = sd_model_hash model.sd_model_checkpint = checkpoint_file def load_model(): from modules import lowvram, sd_hijack checkpoint_info = select_checkpoint() sd_config = OmegaConf.load(shared.cmd_opts.config) sd_model = instantiate_from_config(sd_config.model) load_model_weights(sd_model, checkpoint_info.filename, checkpoint_info.hash) if shared.cmd_opts.lowvram or shared.cmd_opts.medvram: lowvram.setup_for_low_vram(sd_model, shared.cmd_opts.medvram) else: sd_model.to(shared.device) sd_hijack.model_hijack.hijack(sd_model) sd_model.eval() print(f"Model loaded.") return sd_model def reload_model_weights(sd_model): from modules import lowvram, devices checkpoint_info = select_checkpoint() if sd_model.sd_model_checkpint == checkpoint_info.filename: return if shared.cmd_opts.lowvram or shared.cmd_opts.medvram: lowvram.send_everything_to_cpu() else: sd_model.to(devices.cpu) load_model_weights(sd_model, checkpoint_info.filename, checkpoint_info.hash) if not shared.cmd_opts.lowvram and not shared.cmd_opts.medvram: sd_model.to(devices.device) print(f"Weights loaded.") return sd_model